Malicious PDF — malware analysis report

Static analysis result for SHA-256 930a6e6aa98cef76…

MALICIOUS

PDF

41.3 KB Created: 2020-09-06 01:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 413ffa957d463057b55724621c9db165 SHA-1: 067f0a1203eccf1393cde0298a9bcae30d6f76d6 SHA-256: 930a6e6aa98cef76d921c395d7c7feb0a8bb6fed580fb8136ac6948612392239
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of embedded links, many of which point to external resources, a technique often used for SEO manipulation or to host malicious content. One of the primary links, 'https://ttraff.link/wix?keyword=algebra+nation+section+3+topic+6+answers', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to educational material, suggesting a lure to entice users to click the malicious link. No scripts were extracted from this sample.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/wix?keyword=algebra+nation+section+3+topic+6+answers
    • https://static.usrfiles.com/ugd/f0b6b3_f1773f00f1064a02b550337af06a117d.pdf
    • https://static.usrfiles.com/ugd/285be4_00715133108141ee94f1b1422ace7ea1.pdf
    • https://static.usrfiles.com/ugd/665c20_3b2d711e1c2c4c9ba7db32d60acc64e9.pdf
    • https://static.usrfiles.com/ugd/3615fb_cb702af44c2c471c93d9e0650205e19b.pdf
    • https://static.usrfiles.com/ugd/22bf55_494255afaa1744028de9c4786179c2bf.pdf
    • https://static.usrfiles.com/ugd/2ac701_6c2aceae97234c11847894b8b0e16bce.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/wemirijaferulokol.pdf
    • https://cdn.shopify.com/s/files/1/0439/2402/9608/files/16724646389.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/43577778750.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/24527583219.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/sederenaxarilidujitegomi.pdf
    • https://cdn.shopify.com/s/files/1/0446/2444/5603/files/apple_desktop_backgrounds.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/samep.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060fd.bin
684bf59538de618a93e4df22b5bb542374a06382c382c66e704ff5c041c14d15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60FD 5640 bytes
font_01_sfnt_off00007448.bin
1e882194f3fc2c483585a3e49839ae0d3deb27ab96138c2652001f222a126859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7448 10496 bytes

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